Operating thrust reversers at low ground speeds can sometimes cause
- sand or other foreign object ingestion, hot gas re-ingestion.
- hot gas re-ingestion, compressor stalls.
- sand or other foreign object ingestion, hot gas re-ingestion, compressor stalls.
Explanation from PART66Online
At low ground speed the reversed efflux is no longer carried clear of the intake, so it can recirculate into the engine. This causes hot gas re-ingestion (raising intake temperature), stirs up sand and debris for foreign-object ingestion, and the disturbed, hot inlet air can trigger compressor stalls. All three effects can occur.
E
Edigno92 asked · 5 Jun 2013
Hi to everybody. Could u tell me why the compressor stalls in this case? thank
Community Comments (3)
D
deri
1 Feb 2014
Thrust reversers are most effective at higher groundspeeds because the hot reversed gas flow is defelcted by the ram air (ambient airflow) When the aircraft slows down the the ram air has a relatively slower velocity therefore the hot gases are not deflected as much and can be ingested at the inlet. This can then disrupt the normal airflow through the compressor casusing a stall. hope this helps D :-)
D
deri
1 Feb 2014
please note there are two type of reversed gas flow HOT & COLD. ie HOT from core gas path ie in a pure jet. COLD reversed gas flow in a high bi-pass engine where just the fan air is reversed.
N
NIRMALSINHA
2 Feb 2014
It is like chocking as reversing restricts.
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